Finding the Fourth Proportional to 1,435.33, 1,980.43 and 904.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.33 : 1,980.43 = 904.36 : x
2. Step 2: Convert to fraction form
   1,435.33/1,980.43 = 904.36/x
3. Step 3: Cross multiply
   1,435.33x = 1,980.43 × 904.36
4. Step 4: Simplify right side
   1,435.33x = 1,791,019.96
5. Step 5: Solve for x
   x = 1,791,019.96/1,435.33
6. Step 6: Final answer
   x = 1,247.81